全文获取类型
收费全文 | 1296篇 |
免费 | 104篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 58篇 |
妇产科学 | 12篇 |
基础医学 | 129篇 |
口腔科学 | 13篇 |
临床医学 | 163篇 |
内科学 | 243篇 |
皮肤病学 | 8篇 |
神经病学 | 87篇 |
特种医学 | 154篇 |
外科学 | 203篇 |
综合类 | 24篇 |
一般理论 | 1篇 |
预防医学 | 162篇 |
眼科学 | 68篇 |
药学 | 57篇 |
1篇 | |
肿瘤学 | 25篇 |
出版年
2021年 | 14篇 |
2020年 | 10篇 |
2019年 | 9篇 |
2018年 | 17篇 |
2016年 | 9篇 |
2015年 | 14篇 |
2014年 | 24篇 |
2013年 | 31篇 |
2012年 | 51篇 |
2011年 | 46篇 |
2010年 | 25篇 |
2009年 | 26篇 |
2008年 | 47篇 |
2007年 | 49篇 |
2006年 | 59篇 |
2005年 | 54篇 |
2004年 | 52篇 |
2003年 | 41篇 |
2002年 | 44篇 |
2001年 | 48篇 |
2000年 | 36篇 |
1999年 | 34篇 |
1998年 | 29篇 |
1997年 | 27篇 |
1996年 | 27篇 |
1995年 | 20篇 |
1994年 | 29篇 |
1993年 | 20篇 |
1992年 | 23篇 |
1991年 | 28篇 |
1990年 | 25篇 |
1989年 | 38篇 |
1988年 | 35篇 |
1987年 | 40篇 |
1986年 | 29篇 |
1985年 | 19篇 |
1984年 | 25篇 |
1983年 | 28篇 |
1982年 | 19篇 |
1981年 | 20篇 |
1980年 | 24篇 |
1979年 | 23篇 |
1978年 | 11篇 |
1977年 | 14篇 |
1976年 | 22篇 |
1975年 | 10篇 |
1974年 | 15篇 |
1972年 | 8篇 |
1970年 | 9篇 |
1969年 | 6篇 |
排序方式: 共有1412条查询结果,搜索用时 15 毫秒
11.
Relationships of abdominal pain,reports to visceral and temperature pain sensitivity,conditioned pain modulation,and heart rate variability in irritable bowel syndrome 下载免费PDF全文
12.
13.
14.
15.
Bradford Burr Kraetzer 《Arthroscopy》2018,34(4):1156-1157
Propionibacterium acnes has long been known to play a detrimental role in shoulder surgery. This thoughtful and revealing study found significant evidence of lower rates of P. acnes cultured during arthroscopic rotator cuff repair with the use of an adhesive drape and chlorhexidine skin preparation. 相似文献
16.
M M Castillo G Mowatt N Lois A Elders C Fraser W Amoaku J M Burr A J Lotery C R Ramsay A Azuara-Blanco 《Eye (London, England)》2014,28(12):1399-1406
The purpose is to study the diagnostic performance of optical coherence tomography (OCT) and alternative diagnostic tests for neovascular age-related macular degeneration (nAMD). Methods employed are as follows:systematic review and meta-analysis; Index test: OCT including time-domain (TD-OCT) and the most recently developed spectral domain (SD-OCT); comparator tests: visual acuity, clinical evaluation (slit lamp), Amsler chart, colour fundus photographs, infra-red reflectance, red-free images/blue reflectance, fundus autofluorescence imaging (FAF), indocyanine green angiography (ICGA), preferential hyperacuity perimetry (PHP), and microperimetry; reference standard: fundus fluorescein angiography. Databases searched included MEDLINE, MEDLINE In Process, EMBASE, Biosis, SCI, the Cochrane Library, DARE, MEDION, and HTA database. Last literature searches: March 2013. Risk of bias assessed using QUADAS-2. Meta-analysis models were fitted using hierarchical summary receiver operating characteristic (HSROC) curves. Twenty-two studies (2 abstracts and 20 articles) enrolling 2124 participants were identified, reporting TD-OCT (12 studies), SD-OCT (1 study), ICGA (8 studies), PHP (3 studies), Amsler grid, colour fundus photography and FAF (1 study each). Most studies were considered to have a high risk of bias in the patient selection (55%, 11/20), and flow and timing (40%, 8/20) domains. In a meta-analysis of TD-OCT studies, sensitivity and specificity (95% CI) were 88% (46–98%) and 78% (64–88%), respectively. There was insufficient information to undertake meta-analysis for other tests. TD-OCT is a sensitive test for detecting nAMD, although specificity was only moderate. Data on SD-OCT are sparse. Diagnosis of nAMD should not rely solely on OCT. 相似文献
17.
A. Sinclair K. Dhatariya O. Burr D. Nagi K. Higgins D. Hopkins M. Patel P. Kar C. Gooday D. Howarth A. Abdelhafiz P. Newland-Jones S. O’Neill 《Diabetic medicine》2020,37(7):1090-1093
The National Diabetes Stakeholders Covid-19 Response Group was formed in early April 2020 as a rapid action by the Joint British Diabetes Societies for Inpatient Care, Diabetes UK, the Association of British Clinical Diabetologists, and Diabetes Frail to address and support the special needs of residents with diabetes in UK care homes during Covid-19. It was obvious that the care home sector was becoming a second wave of Covid-19 infection and that those with diabetes residing in care homes were at increased risk not only of susceptibility to infection but also to poorer outcomes. Its key purposes included minimising the morbidity and mortality associated with Covid-19 and assisting care staff to identify those residents with diabetes at highest risk of Covid-19 infection. The guidance was particularly created for care home managers, other care home staff, and specialist and non-specialist community nursing teams. The guidance covers the management of hyperglycaemia by discussion of various clinical scenarios that could arise, the management of hypoglycaemia, foot care and end of life care. In addition, it outlines the conditions where hospital admission is required. The guidance should be regarded as interim and will be updated as further medical and scientific evidence becomes available. 相似文献
18.
Cigarette smoking: risk factor for premature facial wrinkling 总被引:8,自引:0,他引:8
D P Kadunce R Burr R Gress R Kanner J L Lyon J J Zone 《Annals of internal medicine》1991,114(10):840-844
OBJECTIVE: To determine if cigarette smoking is a risk factor for the development of premature facial wrinkling. DESIGN: Cross-sectional study. SETTING: Smoking cessation clinic and community. PATIENTS: Convenience sample of 132 adult smokers and non-smokers in 1988. MEASUREMENTS: A questionnaire was administered to quantify cigarette smoking and to obtain information about possibly confounding factors such as skin pigmentation, sun exposure, age, and sex. Wrinkling was assessed using photographs of the temple region, and a severity score based on predetermined criteria was assigned. A logistic regression model, which controlled for confounding variables, was developed to assess the risk for premature wrinkling in response to pack-years of smoking. MAIN RESULTS: The prevalence of premature wrinkling was independently associated with sun exposure and pack-years of smoking. After controlling for age, sex, and sun exposure, premature wrinkling increased with increased pack-years of smoking. Heavy cigarette smokers (greater than 50 pack-years) were 4.7 times more likely to be wrinkled than nonsmokers (95% CI, 1.0 to 22.6; P value for trend = 0.05). Sun exposure of more than 50,000 lifetime hours also increased the risk of being excessively wrinkled 3.1-fold (CI, 1.2 to 7.1). When excessive sun exposure and cigarette smoking occurred together, the risk for developing excessive wrinkling was multiplicative (prevalence ratio of 12.0; CI, 1.5 to 530). CONCLUSION: Cigarette smoking is an independent risk factor for the development of premature wrinkling. 相似文献
19.
20.